Help, our fish are dying!?

Question

We've had a 30l tropical biorb for a few months and our current stock of fish have been living happily together for a few weeks yet suddenly today some seem to be dying. We've lost one spotted mollie who seemed healthy yesterday and now 2 other littlies (not sure what they are called, they're orange with black tails) are just floating near the top looking like they're about to die too, Can I save them?

Answer 1

It's possible that you can save them. First, do a 1/4 water change and then look the fish over for any signs of problems other than the floating at the surface. Any details might be important. Add those to your question and also include your current tank temperature. You can use the little pencil icon to add details to your question. I'll check back and amend my answer based on whet you can tell us.

MM

Answer 2

You have way too many fish in a tiny tank. The shape of the tank is also preventing sufficient oxygen exchange further complicating your problem.
Now as time has gone by, ammonia has started to build from the waste, with no way to break down.
Do a 25% water change. While at the store getting a gravel vac, look for a proper conventional tank with proper filtration and heating, much larger that 30 liters. Your biorb will make a nice candy dish.

Answer 3

how big is your tank? as for a start you may have way too many fish in there. the best thing to do is to get the sick fish out of the big and into a smaller tank. If you have a spare heater and filter for the smaller tank so much the better, you never no you may even save the sick fish. Take about a third of the water out of your big tank clean the filter but clean the filter in the water that you have removed from the tank as there are certain thing's in the (DIRTY) water that are good for the fish, re-fill the tank up and put some P-QUICK in the clean water, also if you have any chemicals that purifier the water and take the chlorine out of the tap water please use them, to the instructions on the bottles. and then weight to see how your fish are

Answer 4

Do a water change NOW and dont forget to add water conditioner. It sounds as if they have swim bladder in which case you will probably lose a few but to save the rest do the water change, up the oxygen for a few hours and remove all the sick fish because if they have a deadly disease you will lose the whole tank by leaving them to die in the same water as the others. Your filter may not be working to its full capacity so check that too. good luck x

Answer 5

magic man's answer was very good. one thing is that mollies are very sensitive to changes in the water, like temperature and ph, so when you put new water in or change the water, make sure the temp. and ph are roughly the same with the water in the tank, so the mollies and some other fish dont get a shock from the difference.

Answer 6

have you checked your ammonia and nitrate levels,with a test kit if your levels are to high ,this could be causing the problem,
are you doing regular water changes 25 percent every week when needed do you have a working filter/pump.
that's quite small your tropical bi orb i would test the water first and go from there.if the readings are high you need to lower them by doing water changes every couple of days for a week or until he levels reach normal

Answer 7

the water maybe did u put a filter bacteria starter stress coat salt and stuff but im not sure if ur supposed to do that for those kind of fish

Answer 8

ok, well ive had this goldfish since i was 3 years old. everytime it looks as if its about to die (lying on its side, gasping for air) i put a bit of whisky in the tank. my gran told me to do it and its worked. its lived for 11 years, is huge and lookin great.

Answer 9

breathe in their gills. my mum has bought our fish back to life 3 times and its still alive now

Answer 10

I agree with DEM, my dad has used whiskey in the past and it has always worked.